Porsche 924 Workshop Manual page 199

The ignition timing has been modified starting
with Model 77 1/2 . With vacuum hoses connec-
+
ted at distributor and idle speed of 950 - 50 rpm
0
the mark designated 3 (3 ATDq on the flywheel
must align with the reference edge .
At an engine speed between 4500 and 5000 rpm
and with the vacuum hoses di.sconnected, the igni-
tion timing must not exceed 41
°.
Printed in Germany - II, 19 77
Ignition System
28
Adjusting ignition timing 28 - 6 a